1) Grand 2) Group of 1000 3) Large integer 4) One thousand 5) Thou 6) Thousand 7) Yard 1) Thou 
one thousand
• (n.) A thousand; the aggregate of a thousand things; especially, a period of a thousand years.
Chil'i·ad noun [ Greek ..., ..., from ... a thousand.] A thousand; the aggregate of a thousand things; especially, a period of a thousand years. « The world, then in the seventh chiliad , will be assumed up unto God. Sir. T. More. » 
chiliad One thousand.
a group of 1000. · a period of 1000 years.
[Difficult words] the cardinal number that is the product of 10 and 100[Obscure words] the cardinal number that is the product of 10 and 100